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3 years ago

Explain how files can be identified as entities on the magnetic surface?

Computers and Technology

1 answer:

Hunter-Best [27]3 years ago

5 0

Answer:

Data is stored on a hard disk drive as a result of magnetism. A file or data is represented in bits on a disk, with 1 representing a magnetized entity and 0 for an unmagnetized surface.

Explanation:

A hard disk drive (HDD) is an electro-magnetic tool for storing data in computing. It is made of moving parts like a platter and read/write head for reading and writing data to the disk.

To read or write data on a disk, the platter spins at a very high speed ( 5000 RPM to 10000 RPM), and the head, at the right surface, writes or reads a bit 1 as a magnetized surface and 0 as unmagnetized.

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Oxnard Casualty wants to ensure that their e-mail server has 99.98 percent reliability. They will use several independent server

sattari [20]

Answer:

The smallest number of servers required is 3 servers

Explanation:

Given

$Reliability = 99.98\%$

$Individual Servers = 95\%$

Required

Minimum number of servers needed

Let p represent the probability that a server is reliable and the probability that it wont be reliable be represented with q

Such that

$p = 95\%\\$

It should be noted that probabilities always add up to 1;

So,

$p + q = 1$ '

Subtract p from both sides

$p - p + q = 1 - p$

$q = 1 - p$

Substitute $p = 95\%\\$

$q = 1 - 95\%$

Convert % to fraction

$q = 1 - \frac{95}{100}$

Convert fraction to decimal

$q = 1 - 0.95$

$q = 0.05$

------------------------------------------------------------------------------------------------

To get an expression for one server

The probabilities of 1 servers having 99.98% reliability is as follows;

$p = 99.98\%$

Recall that probabilities always add up to 1;

So,

$p + q = 1$

Subtract q from both sides

$p + q - q = 1 - q$

$p = 1 - q$

So,

$p = 1 - q = 99.98\%$

$1 - q = 99.98\%$

Let the number of servers be represented with n

The above expression becomes

$1 - q^n = 99.98\%$

Convert percent to fraction

$1 - q^n = \frac{9998}{10000}$

Convert fraction to decimal

$1 - q^n = 0.9998$

Add $q^n$ to both sides

$1 - q^n + q^n= 0.9998 + q^n$

$1 = 0.9998 + q^n$

Subtract 0.9998 from both sides

$1 - 0.9998 = 0.9998 - 0.9998 + q^n$

$1 - 0.9998 = q^n$

$0.0002 = q^n$

Recall that $q = 0.05$

So, the expression becomes

$0.0002 = 0.05^n$

Take Log of both sides

$Log(0.0002) = Log(0.05^n)$

From laws of logarithm $Loga^b = bLoga$

So,

$Log(0.0002) = Log(0.05^n)$ becomes

$Log(0.0002) = nLog(0.05)$

Divide both sides by $Log0.05$

$\frac{Log(0.0002)}{Log(0.05)} = \frac{nLog(0.05)}{Log(0.05)}$

$\frac{Log(0.0002)}{Log(0.05)} = n$

$n = \frac{Log(0.0002)}{Log(0.05)}$

$n = \frac{-3.69897000434}{-1.30102999566}$

$n = 2.84310893421$

$n = 3 (Approximated)$

Hence, the smallest number of servers required is 3 servers

6 0

3 years ago

Choose the best answer from the options below to complete the following sentence.

Lemur [1.5K]

Answer:

its A. the answer to your question is preserved. :)

7 0

2 years ago

Nataly_w [17]

Answer:

5 hours 25 minutes

Explanation:

It takes 25 minutes to finish a hole

It takes 25*13 minutes to finish 13 holes

325 minutes is require to finish 13 holes

Convert 325 minutes to hours and minutes by dividing it by 60

=5 5/12 hours

Convert 5/12 hours to minutes by multiplying by 60

=25 minutes

The answer is 5 hours 25 minutes

5 0

3 years ago

Which of the following is not a characteristic of a large database?

BartSMP [9]

C is the correct answer

8 0

3 years ago

Summarize why understanding the differences between surface culture and deep culture may inform your knowledge, skills, and prof

lorasvet [3.4K]

Answer: By understanding the basic cultural values of the individual such as looks and talk. Also understanding the core values of the individual such as attitude, beliefs and religion. It would improve the behavior in your professional and cultural relationship with individuals in your workplace.

Explanation:

8 0

2 years ago